Method and Apparatus for Transceiving Signals in Wireless Communication Systems

1. A method of transmitting a signal by a first user equipment in a wireless communication system, the method comprising: transmitting a signal for carrier sensing second user equipments during a predetermined period of time in one or more frequency bands among multiple frequency bands of a channel used by the first user equipment, wherein the signal for carrier sensing includes information on a frequency bandwidth of the channel, and wherein the signal for carrier sensing comprises a narrowband-short training field (N-STF), a narrowband-long training field (N-LTF), and a narrowband-signal (N-SIG).

2. The method of claim 1 , wherein the signal for carrier sensing is transmitted before the first user equipment transmits a signal from a frequency bandwidth of the channel.

3. The method of claim 1 , wherein the one or more frequency bands correspond to a frequency band, where multiple channels each having a different bandwidth overlap one another.

4. The method of claim 1 , wherein signal transmission is not carried out during the predetermined period of time in remaining frequency bands excluding the one or more frequency bands.

5. The method of claim 1 , wherein information indicating a position in which a frequency bandwidth of the channel is located within the overall frequency bands of the wireless communication system is included in a beacon frame.

6. A method of receiving a signal by a user equipment in a wireless communication system, the method comprising: receiving a signal for carrier sensing during a predetermined period of time in one or more frequency bands of a channel configured in the wireless communication system, wherein the signal for carrier sensing includes information on a frequency bandwidth of the channel, and wherein the signal for carrier sensing comprises a narrowband-short training field (N-STF), a narrowband-long training field (N-LTF), and a narrowband-signal (N-SIG).

7. The method of claim 6 , wherein the signal for carrier sensing is transmitted before a signal is transmitted from a frequency bandwidth of the channel.

8. The method of claim 6 , wherein the one or more frequency bands correspond to a frequency band, where multiple channels including the channel each having a different bandwidth overlap one another, the different bandwidths being set up in the wireless communication system.

9. The method of claim 6 , wherein signal transmission is not carried out during the predetermined period of time in remaining frequency bands excluding the one or more frequency bands.

10. The method of claim 6 , wherein information indicating a position in which a frequency bandwidth of the channel is located within the overall frequency bands of the wireless communication system is received from a beacon frame.

11. A user equipment transmitting a signal in a wireless communication system, the user equipment comprising: a transceiver; and a processor configured to control the transceiver to: transmit a signal for carrier sensing other user equipments during a predetermined period of time in one or more frequency bands among multiple frequency bands of a channel used by the user equipment, wherein the signal for carrier sensing includes information on a frequency bandwidth of the channel, and wherein the signal for carrier sensing comprises a narrowband-short training field (N-STF), a narrowband-long training field (N-LTF), and a narrowband-signal (N-SIG).

12. A user equipment receiving a signal in a wireless communication system, the user equipment comprising: a transceiver; and a processor configured to control the transceiver to: receive a signal for carrier sensing during a predetermined period of time in one or more frequency bands configured in the wireless communication system, wherein the signal for carrier sensing includes information on a frequency bandwidth of the channel, and wherein the signal for carrier sensing comprises a narrowband-short training field (N-STF), a narrowband-long training field (N-LTF), and a narrowband-signal (N-SIG).